Inverter Service Manual

SJ300-300HF , L300P-370HFR Circuit Diagram
Option Board
Option Board
1
2
H I T A C H I
STR
RUN
STOP/RESE
FUNC
P
U
V
W
Logic Board
J1
J1
OPTXC
OPT1C
OPTXC
OPT2C
TMC
SP
SN RP SN
P24 PLC
FW 8
7
6
5
4
3
2
1
CM1
FM TH
CM1 11
12
13
14
15
CM2
H
O
OI
O2
L
AM
AMI
AL2
AL1
ALO
Control Terminal Board
CN1
PLUG
OPEC
Digital
Operator
Plug
Main Board
R
S
T
G
N
G
CTW
J10
J11
J16
J52
J41
DM Board
+
++
+
IGBT
J31
Thermistor
J52
J41
DM
R T
Note: Control terminal symbol is SJ300
J61
J53
J54
J55
Control
Power Board
R
T
J51
To
Ro
Pre Control Power Board
J65
J65
J62
J62
J64
J64
J32
Thermistor
FAN
J21
FAN
J22
FAN
J23
CTU
J71
J71
J56
J56
CT Board
PD